X-ray constraints on dark matter in groups of galaxies

Details X-ray constraints on dark matter in groups of galaxies X-ray constraints on dark matter in groups of galaxies

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aipc..336..243m&link_type=abstract

Dark matter. AIP Conference Proceedings, Volume 336, pp. 243-250 (1995).

Computer Science

3

Dark Matter, X-Ray, Small And Compact Galaxy Groups

Scientific paper

A summary of recent ROSAT and ASCA observations of poor groups is presented with an emphasis on mass determinations from X-ray data. Although the number of groups with detected diffuse X-ray emission is still small, some trends are beginning to become apparent. Detectable diffuse X-ray emission appears to be largely restricted to those systems with low spiral fractions. Despite a considerable range in gas mass, the range in total group mass is very small with all of the systems having a mass around ~2×1013 Msolar. The baryonic fraction of these groups is very low implying they are dominated by dark matter.

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